Bearing shell, bearing, piston engine and use of a bearing shell
EP4544198C0Active Publication Date: 2026-05-06WARTSILA FINLAND OY
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Patent Information
- Application Number
- EP2022736322
- Authority / Receiving Office
- EP · EP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2022-06-22
- Publication Date
- 2026-05-06
- Estimated Expiration
- 2042-06-22
AI Technical Summary
Technical Problem
Existing big end bearings in piston engines experience uneven wear of the crankpin, leading to the formation of ridges that cause overloading and local wear of the bearing, particularly at top dead center, which can persist even after bearing replacement.
Method used
The bearing shell features an oil groove with a first and second straight portion running in the circumferential direction and a third portion that deviates axially, ensuring uniform crankpin wear by minimizing non-contact areas and reducing ridge formation.
Benefits of technology
The solution promotes uniform crankpin wear, reducing overloading and local wear of the bearing, thereby enhancing the durability and performance of the piston engine.
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